The Cosmic Web of our Local Universe

Galaxy properties such as morphology, star formation, and angular momentum are shaped by their surrounding cosmic web, yet the precise environment of the Local Group remains debated, with different reconstructions placing it in filaments, sheets, or void-like regions. Resolving this ambiguity is essential for unbiased interpretation of local observations and for assessing whether our cosmic neighborhood is typical. No single reconstruction captures the full uncertainty inherent in the data, so we work with an ensemble of 300 constrained realizations that sample the range of large-scale environments consistent with observations, enabling genuinely probabilistic statements about the Local Group’s cosmic-web membership. We present a probabilistic cosmic web atlas of the local Universe, assigning ensemble-based environment classifications to observed structures in our cosmic neighborhood